HSA800 후판재의 완전용입 맞댐용접부 휨-인장강도 실험 (Flexural Tensile Strength of CJP Groove Welded Joints Connecting Thick HSA800 Plates)
| Author(s): |
Cheol Ho Lee
Dae Kyung Kim Kyu Hong Han Chang Hee Park Jin Ho Kim Seung Eun Lee Do Hwan Kim |
|---|---|
| Medium: | journal article |
| Language(s): | Korean |
| Published in: | Journal of Korean Society of Steel Construction (한국강구조학회 논문집), October 2014, n. 5, v. 26 |
| Page(s): | 407-418 |
| DOI: | 10.7781/kjoss.2014.26.5.407 |
| Abstract: | As a continuing work of previously conducted standard tension tests, full-scale flexural tests were conducted in this study to assess the structural performance the CJP groove welded joints connecting thick HSA800 plates. Two welding electrodes were available at the time of this experimental research; one was GMAW-based electrode A and the other FCAW-based electrode B. Three full-scale box-type beam specimens with single bevel- and V-groove CJP welded joints were fabricated from 60mm and 25mm thick HSA800 plates according to the AWS-prequalified groove welded joint details. In designing the specimens, all possible limit states like local and lateral torsional buckling were carefully controlled in order to induce flexural plastic yielding or eventual joint fracture. All the CJP joints made by both welding electrodes showed satisfactory performance and were able to transfer the tensile flange forces higher than that corresponding to the measured tensile strength of HSA800 flange plates. However, it should be noted that, during fabrication, serious concerns about the welding efficiency and workability of the GMAW-based electrode were raised by a certified welder. The fracture occurred at the unbeveled (or vertical) interface between the weldment and the base metal when the GMAW-based electrode was used in the single-bevel joint, implying the possibility of insufficient melting. Thus, the FCAW-based electrode B is again recommended as the choice of welding electrode for HSA800 plates. The limited test data of this study implies that the V-groove CJP joint should be used in favor of the single bevel CJP joint, if possible. |
| Keywords: |
high-strength steel weldability thick plate
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10326372 - Published on:
14/07/2019 - Last updated on:
16/04/2023
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